Why do we need a power supply test method?
Power supplies represent a first step to capture a big chunk of readily available energy savings. Testing can be too simple to predict real world performance or too complex to justify its cost. Aiming for a balance between usefulness and cost effectiveness. Why do we need a standard test method?
What is a power supply voltage test?
The list below contains a brief description of some of these tests. This test involves the measure-ment of the periodic and random deviation of a power supply’s output current or voltage (typically over 8 hours), typically covering a bandwidth from dc to 20 Hz. The electronic load used for this test should be able to operate in CC or CV mode.
How many load settings should be used in a power supply test?
At least two load settings should be used, one of them being the maximum rated load for the power supply under test (see Figure 9 for test configuration). Some power supplies vary sub-stantially in efficiency and power factor as a function of loading.
What instruments are used in power supply testing?
The tests covered in the follow-ing section are configured with standard instrumentation: electronic loads, digital oscilloscopes, digital multime-ters, true rms voltmeters, wattmeters, and ac power sources. Electronic loads can facilitate power supply testing in several ways.
Why is automation important in power supply testing?
Automation is often essential due to large volume testing, which requires high test throughput and test repeatabil-ity. Power supply test instru-ments must then be computer programmable. For both test environments, measurement synchronization is necessary to perform some tests properly and to obtain valid data.
Why is a power supply efficiency test important?
This test serves as a good indi-cation of the overall correct operation of the power supply under test. If the measured efficiency is outside the speci-fied range for the topology of the power supply, it is probable that a design flaw or a manu-facturing problem exists that should be addressed.
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Power Supply Testing (with Electronic Loads)
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